package com.atguigu.eduservice.controller;

import com.atguigu.commonutils.R;
import com.atguigu.eduservice.entity.EduTeacher;
import com.atguigu.eduservice.entity.vo.TeacherQuery;
import com.atguigu.eduservice.service.EduTeacherService;
import com.atguigu.servicebase.exceptionhandler.GuLiException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * 讲师 前端控制器
 * </p>
 *
 * @author testjava
 * @since 2021-05-24
 */
//交给spring管理对象 + 返回json数据
@Api(description = "讲师管理接口")
@RestController
@RequestMapping("/eduService/teacher")
public class EduTeacherController {

    //访问地址  http://localhost:8001/eduservice/teacher/findAll
    //把service注入
    @Autowired
    private EduTeacherService teacherService;

    //1、查询讲师表所有数据
    //rest风格
    @ApiOperation(value = "查询所有讲师列表")
    @GetMapping("/findAll")
    public R findAllTeacher() {
        //调用service的方法实现查询所有的操作
        List<EduTeacher> list = teacherService.list(null);
        return R.ok().data("items",list);
    }

    //2、逻辑删除讲师方法
    @ApiOperation(value = "逻辑删除讲师")
    @DeleteMapping("{id}")
    public R removeTeacher(@ApiParam(name = "id", value = "讲师ID", required = true) @PathVariable String id){
        boolean flag = teacherService.removeById(id);
        if (flag){
            return R.ok();
        }else {
            return R.error();
        }
    }

    //3、分页查询讲师的方法
    //current 当前页
    //每页记录数
    @ApiOperation(value = "分页查询讲师")
    @GetMapping("/pageTeacher/{current}/{limit}")
    public R pageListTeacher(@PathVariable long current,
                             @PathVariable long limit) {

        try {
            //异常
            int i = 1 / 0;
        }catch (Exception e) {
            //抛出自定义异常
            throw new GuLiException(20001,"执行了自定义异常处理...");
        }

        //创建page对象
        Page<EduTeacher> pageTeacher = new Page<>(current,limit);
        //调用方法实现分页
        //调用方法的时候，底层封装，把分页所有数据封装到pageTeacher对象里面
        teacherService.page(pageTeacher, null);

        //总记录数
        long total = pageTeacher.getTotal();
        //数据list集合
        List<EduTeacher> records = pageTeacher.getRecords();

        Map map = new HashMap();
        map.put("total",total);
        map.put("rows",records);

        return R.ok().data(map);

        //return R.ok().data("total",total).data("rows",records);
    }

    //4、条件查询带分页的方法
    //@RequestBody，把json数据封装到对应的对象里面，需要Post请求
    //@ResponseBody,返回json数据
    //@RequestBody(required = false) TeacherQuery teacherQuery，参数值可以为空
    @ApiOperation(value = "按条件分页查询讲师")
    @PostMapping("/pageTeacherCondition/{current}/{limit}")
    public R pageTeacherCondition(@PathVariable long current, @PathVariable long limit,
                                  @RequestBody(required = false) TeacherQuery teacherQuery){
        //创建page对象
        Page<EduTeacher> pageTeacher = new Page<>(current,limit);

        //构建条件
        QueryWrapper<EduTeacher> wrapper = new QueryWrapper<>();

        //多条件组合查询
        //mybatis，学过动态SQL
        String name = teacherQuery.getName();
        Integer level = teacherQuery.getLevel();
        String begin = teacherQuery.getBegin();
        String end = teacherQuery.getEnd();

        //判断条件值是否为空，如果不为空拼接条件
        if (!StringUtils.isEmpty(name)) {
            //构建条件
            wrapper.like("name", name);
        }
        if (!StringUtils.isEmpty(level)) {
            //构建条件
            wrapper.eq("level", level);
        }
        if (!StringUtils.isEmpty(begin)) {
            //构建条件
            wrapper.ge("gmt_create", begin);
        }
        if (!StringUtils.isEmpty(end)) {
            //构建条件
            wrapper.le("gmt_create", end);
        }

        //调用方法实现条件查询分页
        teacherService.page(pageTeacher,wrapper);

        //总记录数
        long total = pageTeacher.getTotal();
        //数据list集合
        List<EduTeacher> records = pageTeacher.getRecords();

        return R.ok().data("total",total).data("rows",records);
    }

    //5、添加讲师接口的方法
    @ApiOperation(value = "添加讲师")
    @PostMapping("/addTeacher")
    public R addTeacher(@RequestBody EduTeacher eduTeacher) {
        boolean save = teacherService.save(eduTeacher);
        if (save) {
            return R.ok();
        }else {
            return R.error();
        }
    }

    //6、根据讲师ID查询
    @ApiOperation(value = "根据ID查询讲师")
    @GetMapping("/getTeacher/{id}")
    public R getTeacher(@PathVariable String id) {
        EduTeacher eduTeacher = teacherService.getById(id);
        return R.ok().data("teacher", eduTeacher);
    }

    //7、讲师修改功能
    @ApiOperation(value = "根据ID修改讲师")
    @PostMapping("/updateTeacher")
    public R updateTeacher(@RequestBody EduTeacher eduTeacher) {
        boolean flag = teacherService.updateById(eduTeacher);
        if (flag) {
            return R.ok();
        }else {
            return R.error();
        }
    }

    
}

